Element of a shoe sole



FIG. 1 is a bottom plan view of an element of a shoe sole showing my new design; and

FIG. 2 is an enlarged bottom plan view of an element of a shoe sole showing my new design.

The broken line showing of a shoe in FIG. 1 is environmental only and forms no part of the claimed design. 

The ornamental design for an element of a shoe sole, as shown and described. 